Means for adjusting clutch-inserts.



.Ik JUNGJUHANN. MEANS FOR ADJUSTING CLUTCH INSBRTS.

APPLIOATION FILED JANJZI, )912.

1,'041093, v Patented Oct. 15, 1912.

M237 6556.5.' fra/caan' n Wa/zik Jwzfjolzatzlz. y j Wa FRANK J'UNaJorIANN, 9F DAVENPORT, Iowa.

MEANS FOR ADJUSTING CLUTCH-INSEBTS.

Specification of Letters Patent.

Application led January 31, 1912. Serial No. 674,59'6.

To all whom 'it may concern:

Be it known that I, FRANK JUNGJOHANN, a citizen of the,United States of A merica, and resident -of Davenport, Scott county, Iowa, have invented a certain new and useful Im rovement in Means for Adjusting Clutchnserts, of which the following is a specification.

My invention relates to improvements in friction devices generally, the friction surfaces of which are provided with inserts of pliable material (such as cork). lVhile it could be applied most advantageously to belt driven pulleys, brakes, etc., it is.` d1- rected more especially to friction clutches, particularly of the c one type commonly used in automobile power transmission; and the objects of my improvement are first, toA perpetuate the effectiveness of the friction surfaces; second, to afford simple and absolutely dependable means for the proper. adjustment of the friction inserts; third, to vgreatly reduce the present cost of readjustments and fourth, to make the task of adjustment possible by the most unskilled.

-Wth the cork inserts properly adjusted, the cone clutch has roved a most satis'- factory and efficient evice, but when the inserts wear to an extent that the steel surface of one memberI of the4 clutch contacts the' usual leather covered surface of the other member, it loses its s teadygrip and becomes spasmodicand jerky in its action. Readjustment of the inserts becomes necessary. In connection with automobiles, this adjustment is not only difficult and expensive b'ut requires the services of theskilled mechanic. It is the common practice to dismantle the machinery, remove the clutch, drive the corks out oftheir retaining sock ets,.plac'e paper shims in the bottom thereof and.l drive `fthezc'orks'. b ackto place, exercising *the greatest'- care torfinsur'e their proper ad- 'fju'stmentfrelativebone to the-otherfand to the Asurfaceeof the:retainingrimffy l :':Tlie mainwobjectf. :of fm lnvention 4is:` 4to providefsimpleay yaccurate y; r graduated adpjustin'g -imeansr wherebygthe most unskilled icanfiquicklyr-.and :easilyreadjust the: dnserts 1with ut. frelnovahrofi the? clutch or of the .inserts. f.-."V1\..-W 1 l .:Whiler-finserts c have I'been lprovided with adjusting means,privor to. `my invention, fthe Patented Oct. 15,1912.

exact degree of adjustment could notbe controlled.l In fact these prior devices were applied to belted pulleys wherein the necessity for the minutely exact adjustment f the inserts relative to one another and to the face of the friction surface, did no t exist.

My invention is directed es ecially to means which absolutely contro beth un?- formityland degree of adjustment, 'conditions absolutely essential when applied to cone type of friction clutches. 4

I attain these objects by the mechanism illustrated in the accomnanvir'f drawin's, in which- P Figure 1 is a front elevation of the inside or male member of a cone friction clutch showing my improvement applied thereto. Fig. 2'is a sectional view taken on dotted line A-B, Fig. 1. Fig. 3 is 'an enlarged viewj, partly in section, showing my invention" in detail.

rSimilar numerals refer to similar vparts j throughout the several' views.V

As thus illustrated the 'power transniitf ting device involves the usual Ifriction niember 1 provided with the bevelor cone shaped friction rim 2 and leather covering 3,. which .is made to coperate in theus'ual manner with the'opposing or 'cup` portion'V of the clutch. As the clutch proper or the 4mechanism for' operating same '1s no part of my invention, 'same are not shown.

Pendant from the under side f the friction rim and adjacent lto the web of member l are a multiplicity 'of bosses 4l provided with recesses or sockets for the reception of non-metallic inserts, s uch asA cork or other pliable material.

.Screw threaded into the outer end of each boss and communi; ating thebottom of the insert socket, 4is ,thegaduat'd `adjusting l'screw 'and screwathreaded 'into the :side of the `lboss andi* in adjusting` screw: `5.y ist theretainin -While ithe vopeningy in lthe. `side' )o .1 i the` bossl -ispl l made Y `to communicate. .,with 1 fed'usting lscrew, retaining` Screwlffenters sai open- 'ing onlyli part way; the .remaining .portion of alinea'. ent with zvo :screw p L the openingv beingcccu'pied by thecoil spring 8 and indicator point or'bfallt); .s ldjllstll screw 5 islprovidd withthenarrowlong tudinal; slots 10. .located ",o'nxthe quarter, ex

tending the threaded length of the threaded portion and to a depth equal to that ofthe threads or a triiie more. Screw 5 is made to Contact the metalplate 'or washer 11 located under the insert 7. The inserts pass throughperforations in the leather covering 3 and caused t-o extend sufficiently beyond to contact the inner face of the opposing member of theclutch whenvin locked position .(not shown). v

lVhen, from continued use the protruding portion of the inserts 7 wear sufficiently to permit the opposing member of the clutch to come in direct Contact with the leather surface 3, the clutch at once, `loses that steady grip so characteristic of the friction surface afforded by the exposed inserts.

To avoid the heretofore expensive, labo-Y rious and uncertain task of readjusting the 2'0, inserts and to Ienable the most unskilled to quickly, easily` andproperly adjust.` them, I

have provided adjusting screw 5 with a number of slots 10, usually four, placed quartering. Indicator` point or ball 9 normally rests in one of the slots, being firmly but yieldingly held in such position by the spring 8 within a force as determined by the position in or vout of the retaining screw Now by turning screw 5 until the ball 9 has been forced out of one slot "and made to enter the next one, the insert 7 has been advanced a distance as determined by the distancel apart of the'slots and the number of threads per inch on -screw 5. The maximum adjustment permissible of inserts 7 having been previously determined, the slots `and threads are proportioned accordingly. Y It is thus seen that an absolutely positive and accurate adjustment is impartedto the insert by simply turning'the adjusting lscrew until ,the indicator ball has made one pulsation, that is forced out of .one slot into the next. A task requiring no skill whatever. As `these pulsations are dis-` tinctly felt in the. act of turning. the adn justing screw, it is unnecessary that the parts be in sight, it can be entirely accomplished by the sense of touch, a most desirable situation in connection with an automobile, thus avoiding dismantling or removing the parts, which are usually dilicult of access.

` I am aware that prior to my invention, a common screw ladjustment has been applied to inserts in connection with belted pulleys, but from the foregoing, it is readily seen that without some means to absolutely determine the degree of adjustment, the plain screw, even though provided with lock nuts, must fail. I therefore do not claim such combination broadly; but

lVh-at I claim as my invention is: 1. In combination power transmitting .devices having friction surfaces provided with inserts,` and devices adapted to adjust adapted to positively said inserts a positive predetermined degree relative to the friction surface.

Q. In combination, power transnuttmg'devices having friction surfaces provided with cate the degree or extent of adjustment. v

4. In combination, friction devices, having friction surfaces provided with inserts, devices adapted to adjust said inserts relative to the friction surface, and means indicate vthe degree or amount of adjustment.

5. In combination, friction devices having-'friction surfaces provided with inserts, 1 insert adjusting devices, and degree-ofadjustment indicating 'means controlled by said adjusting devices.

6. In combination, power transmitting de-V non-metallic inserts, insert adjusting devices, and degree-of-adjustmnt indicating' means controlled by said adjusting devices.

7. In combination, vfriction devices having friction surfaces provided with inserts, and graduated screwdevices adapted to adjust to a predetermined degree said inserts' relative to the friction surface.

8. In combination, friction devices having 1'00 friction surfaces. provided 'with inserts, Y graduated screw insert adjusting device, and indicating means adapted to vdeterminedegree or amount. of adjustment. o

' 9. vIn combination, power transmitting de- 105 vices having friction surfa s provided with inserts, graduated screw insert adjusting device, yand `indicating means controlled by said graduated screw adapted to determin degree oramount of adjustment.

10. In combina-tioma conevfriction clutch having friction lsurfaces provided with inserts, graduated screw insert adjusting de .vi ce, and indicating means controlled by said graduated screw adapted to determinedegree or amount of adjustment. 1l. In combination, a friction clutch mein# ber provided withbosses, recesses insaid bosses, cork inserts in said recesses, adjusting screws threaded into said bosses and communicating with said recesses, a plurality of slots in said adjusting screws, an indicating ball engaging one of said'slots, `a spring engaging said ball, anda retain' screw engaging. said spring, substantially as shown and described.l

l2. In combination, a friction clutch member provided with bosses, recesses in said bosses, insert-s in vsaid recesses, adjust' screws 'threaded into said bosses, longitu-4 130 90 vvices having friction surfaces providedwith diaal lsluts 4in said adjusting scews, and a l the side of said bosses, balls engaging said 10 spin actuated indicator' dapted to engage 5 slots, and sp1-ings engaging said balls and said s ots. 1 said retaimng screws.

13. In cmbi'naton, a- 'friction clutch Signed by me this 27th day of Jan., 1912.

l membeij providedy with bosses, recesses in FRANK JUNGJOHANN said bosses,l non-metallic inserts, in isaid re- 4cesses, adjusting screws threaded into end Witnesses: 'of said bosses, longltudlnal slots 1n sind ad- A. H. S'L'OLTENBERG, )ustlng screws, retammg screws threaded m H. J UNGJUHANN. 

